High-Voltage Autonomous Current-Fed Push-Pull Converter with Wireless Communication Applied to X-Ray Generation

This brief presents an adjustable 100 kV high voltage DC power supply with ZigBee wireless feedback for the X-ray system. The proposed system is powered by a 48 V DC power source, and a combination of an autonomous current-fed push-pull converter with a high voltage transformer is used to step up the output voltage. At the end of the secondary of the high voltage transformer, a combination of half-wave voltage multipliers is used to achieve desired output of DC high voltage. Two microcontrollers with wireless communication modules are used to control the output voltage. Moreover, the equivalent inductance of the high voltage transformer with an extra capacitor is utilized to form a parallel resonant circuit to lead the power switch of the autonomous current-fed push-pull converter can achieve zero voltage switching to reduce the switching loss. The mathematical model of the system is derived, and the complete design considerations are established. Finally, the feasibility of the proposed system is verified by the experimental results efficiency of the developed model reaches 95% under low power high voltage applications.